[Resolved]  Hyundai — Hyundai i10 Steering Problem

I bought hyundai i10 Magna in May 2008 from MGF Hyundai. 10 months later I installed CNG from Govt. authorize fitment center and after 1 month suddenly my Car Steering starts giving problems and EPS stopped working. I took my CAR to hyundai dealer MGF Hyundai and NIMBUS hyundai (NOIDA) and they said that this is OEM problem and most of the i10 has same problem so I would get replacement of EPS but when they noticed that my car has CNG installed they told my that I will not get any replacement as my warranty is void and they told my to pay 24000 for EPS replacement. I would like to know when most of the i10 has same problem they why company is not replacing my EPS when there is no relation of CNG with power steering.